运有大运，有主运，当年年干建运，通主一年，此为大运。或太角，或少角，俱从大寒日始，
以次相生，至羽而终。每运各主七十三日零五刻，总五运之数，则三百六十五日零二十五刻而成
一岁，此为主运。主运太少皆根据大运。阳年属太，阴年属少。上生至角而止，下生至羽而止。上
下相生，皆须太少相因，不可失序。
假如甲运，太宫土也。上生太宫者，少征火。生少征者，太角木。此谓上生至角是也。又太
宫土，下生者，少商金，金生太羽水。此谓下生至羽是也。甲与己合，己从少宫，上下相生焉。
又如乙运，少商金也。上生少商者，太宫土。生太宫土者，少征火。生少征火者，太角木。
此亦谓上生至角也。又少商，下生者，太羽水。此亦谓下生至羽也。乙与庚合。庚从太商，上下相生焉。
又如丙运，太羽水也。上生太羽者，少商金。生少商金者，太宫土。生太宫土者，少征火。
生少征火者，太角木。此谓上生至角也。丙与辛合，辛从少羽，上生焉。
又如丁运，少角木也。少角下生者，太征火。火生少宫土，土生少商金，金生少羽水。此谓
下生至羽也。丁与壬合，壬从太角，下生焉。
又如戊运，太征火也。上生太征火者，少角木也。太征下生者，少宫土。土生太商金，金生
少羽水。此亦谓上生至角，下生至羽也。戊与癸合，癸从少征，上下相生焉。
是以逐年主运皆根据大运。或太角为初，则太羽为终；或少角为初，则少羽为终。经于各条大运
角下注一初字，羽下注一终字，又以示人主运角羽之太少初终也。
甲乙丙壬癸五年，皆太角木为初运，主七十三日。自大寒日起，至春分后十三日止也。少征
火为二运，主七十三日，自春分后十三日起，至小满后二十五日止也。太宫土为三运，主七十三
日，自小满后二十五日起，至大暑后三十七日止也。少商金为四运，主七十三日，自大暑后三十
七日起，至秋分后四十九日止也。太羽水为终运，主七十三日，自秋分后四十九日起，至大寒而终也。
戊己庚辛丁五年，皆少角木为初运，太征火为二运，少宫土为三运，太商金为四运，少羽水
为终运也。
按《天元玉册》，又有岁之客营运于主运之上，与六气主客之法同，故曰岁中客运者，常以
应于前二十日为初运。
申子辰岁大寒日寅初交 亥卯未岁大寒日亥初交
寅午戌岁大寒日申初交己酉丑岁大寒日巳初交
此五运相生而终岁度也。然于经未见其用。以六气言之，则运亦当有主客，以行天令。盖五
行之运，一主其气，岂四而无用不行生化者乎？然当年大运乃通主一岁，如司天通主上半年之法。
《天元玉册》言五运之客互主一年，则经所载者乃逐年之主运也，明当以《玉册》为法。
The Five Movements (Wu Yun) are divided into the Great Movement (Da Yun) and the Principal Movement (Zhu Yun). The movement established by the Heavenly Stem of the year governs the entire year, which is called the Great Movement. It may be Tai Jue (Yang Wood) or Shao Jue (Yin Wood), both starting from the day of Major Cold (Dahan), succeeding each other in order, and ending with Yu (Water). Each movement governs 73 days and 5 ke (a traditional unit of time). The total number of the five movements amounts to 365 days and 25 ke, constituting one year; this is called the Principal Movement. The Tai (excess/yang) and Shao (deficient/yin) of the Principal Movement are all based on the Great Movement. Yang years belong to Tai, and Yin years belong to Shao. Generation from above ends at Jue (Wood); generation from below ends at Yu (Water). Both upward and downward generation must follow the principle of Tai and Shao interdependence, without losing sequence.
For example, if it is the Jia movement, it is Tai Gong (Earth). That which generates Tai Gong from above is Shao Zheng (Fire). That which generates Shao Zheng is Tai Jue (Wood). This is what is meant by "generation from above ends at Jue." Furthermore, for Tai Gong (Earth), that which is generated from below is Shao Shang (Metal), and Metal generates Tai Yu (Water). This is what is meant by "generation from below ends at Yu." Jia combines with Ji; Ji follows Shao Gong, undergoing upward and downward generation accordingly.
Again, for example, if it is the Yi movement, it is Shao Shang (Metal). That which generates Shao Shang from above is Tai Gong (Earth). That which generates Tai Gong is Shao Zheng (Fire). That which generates Shao Zheng is Tai Jue (Wood). This too is what is meant by "generation from above ends at Jue." Furthermore, for Shao Shang, that which is generated from below is Tai Yu (Water). This too is what is meant by "generation from below ends at Yu." Yi combines with Geng. Geng follows Tai Shang, undergoing upward and downward generation accordingly.
Again, for example, if it is the Bing movement, it is Tai Yu (Water). That which generates Tai Yu from above is Shao Shang (Metal). That which generates Shao Shang is Tai Gong (Earth). That which generates Tai Gong is Shao Zheng (Fire). That which generates Shao Zheng is Tai Jue (Wood). This is what is meant by "generation from above ends at Jue." Bing combines with Xin; Xin follows Shao Yu, generating from above accordingly.
Again, for example, if it is the Ding movement, it is Shao Jue (Wood). That which is generated from below by Shao Jue is Tai Zheng (Fire). Fire generates Shao Gong (Earth), Earth generates Shao Shang (Metal), and Metal generates Shao Yu (Water). This is what is meant by "generation from below ends at Yu." Ding combines with Ren; Ren follows Tai Jue, generating from below accordingly.
Again, for example, if it is the Wu movement, it is Tai Zheng (Fire). That which generates Tai Zheng from above is Shao Jue (Wood). That which is generated from below by Tai Zheng is Shao Gong (Earth). Earth generates Tai Shang (Metal), and Metal generates Shao Yu (Water). This too is referred to as "generation from above ends at Jue, generation from below ends at Yu." Wu combines with Gui; Gui follows Shao Zheng, undergoing upward and downward generation accordingly.
Therefore, the annual Principal Movement is always based on the Great Movement. If Tai Jue is the initial movement, then Tai Yu is the final movement; if Shao Jue is the initial movement, then Shao Yu is the final movement. In the classics, under each Great Movement entry for Jue, the character "Chu" (Initial) is annotated, and under Yu, the character "Zhong" (Final) is annotated, further indicating to people the Tai/Shao status and Initial/Final relationship of the Principal Movement at Jue and Yu.
In the years of Jia, Yi, Bing, Ren, and Gui, Tai Jue (Wood) is always the initial movement, governing 73 days. From the day of Major Cold until 13 days after the Spring Equinox. Shao Zheng (Fire) is the second movement, governing 73 days, from 13 days after the Spring Equinox until 25 days after the Grain Full (Xman). Tai Gong (Earth) is the third movement, governing 73 days, from 25 days after Grain Full until 37 days after the Great Heat (Dashu). Shao Shang (Metal) is the fourth movement, governing 73 days, from 37 days after Great Heat until 49 days after the Autumn Equinox. Tai Yu (Water) is the final movement, governing 73 days, from 49 days after the Autumn Equinox until Major Cold.
In the years of Wu, Ji, Geng, Xin, and Ding, Shao Jue (Wood) is the initial movement, Tai Zheng (Fire) is the second movement, Shao Gong (Earth) is the third movement, Tai Shang (Metal) is the fourth movement, and Shao Yu (Water) is the final movement.
According to the *Tianyuan Yuce* (Jade Register of the Heavenly Origin), there is also the Guest Movement of the year operating upon the Principal Movement, similar to the method of Principal and Guest of the Six Qi. Hence, it is called the Guest Movement of the Year, often corresponding to the first twenty days as the initial movement.
In years of Shen-Zi-Chen, the transition occurs at the beginning of Yin hour on the day of Major Cold; in years of Hai-Mao-Wei, at the beginning of Hai hour; in years of Yin-Wu-Xu, at the beginning of Shen hour; in years of Si-You-Chou, at the beginning of Si hour.
This is the method of the five movements generating each other to span the year. However, its application is not seen in the classics. Speaking from the perspective of the Six Qi, the movements should also have a distinction between Principal and Guest to execute the commands of Heaven. Presumably, the movements of the Five Elements each govern their respective Qi; how could four of them be useless and not perform generation and transformation? However, the Great Movement of the current year governs the entire year, just as the Si Tian (Heavenly Supervisor) governs the first half of the year. The *Tianyuan Yuce* states that the Guest Movements of the Five Movements mutually govern the year; thus, what is recorded in the classics refers to the annual Principal Movement. Clearly, one should take the *Yuce* as the standard.